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Note 5 - Permit and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2016
Notes to Financial Statements |
Intangible Assets Disclosure [Text Block] | NOTE 5 PERMIT AND OTHER INTANGIBLE ASSETS The following table summarizes changes in the carrying amount of permits. No permit exists at our Services and Medical Segment.
Permit (amount in thousands) |  | Treatment |
Balance as of December 31, 2014 |  | $ | 16,709 |
PCB permit amortized (1) |  |  | (55 | )
Permit in progress |  |  | 107 |
Balance as of December 31, 2015 |  |  | 16,761 |
PCB permit amortized (1) |  |  | (55 | )
Permit in progress |  |  | 56 |
Permit impairment for M&EC subsidiary |  |  | (8,288 | )
Balance as of December 31, 2016 |  | $ | 8,474 |
(1) Amortization for the one definite-lived permit capitalized in 2009. This permit is being amortized over a ten year period in accordance with its estimated useful life. Net carrying value of this permit was approximately $117,000 and $172,000 as of December 31, 2016 and 2015, respectively. The following table summarizes information relating to the Company’s definite-lived intangible assets:
|  |  |  |  |  |  | December 31, 2016 |  |  | December 31, 2015 |
|  | Useful Lives (Years) |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Intangibles (amount in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patent |  | 3 | - | 17 |  |  | $ | 577 |  |  | $ | (274 | ) |  | $ | 303 |  |  | $ | 539 |  |  | $ | (203 | ) |  | $ | 336 |
Software |  |  | 3 |  |  |  |  | 405 |  |  |  | (383 | ) |  |  | 22 |  |  |  | 395 |  |  |  | (364 | ) |  |  | 31 |
Customer relationships |  |  | 12 |  |  |  |  | 3,370 |  |  |  | (1,974 | ) |  |  | 1,396 |  |  |  | 3,370 |  |  |  | (1,671 | ) |  |  | 1,699 |
Permit |  |  | 10 |  |  |  |  | 545 |  |  |  | (428 | ) |  |  | 117 |  |  |  | 545 |  |  |  | (373 | ) |  |  | 172 |
Total |  |  |  |  |  |  | $ | 4,897 |  |  | $ | (3,059 | ) |  | $ | 1,838 |  |  | $ | 4,849 |  |  | $ | (2,611 | ) |  | $ | 2,238 |
The intangible assets are amortized on a straight-line basis over their useful lives with the exception of customer relationships which are being amortized using an accelerated method. The following table summarizes the expected amortization over the next five years for our definite-lived intangible assets:
Year |  | Amount (In thousands) |
2017 |  | $ | 372 |
2018 |  |  | 337 |
2019 |  |  | 254 |
2020 |  |  | 218 |
2021 |  |  | 198 |
|  | $ | 1,379 |
Amortization expense recorded for definite-lived intangible assets was approximately $448,000 and $471,000, for the years ended December 31, 2016 and 2015, respectively.

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